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A method of producing a well utilizes a submersible pump run on a line, such as braided wire rope, that includes power conductors. The operator sets a packer in the casing, the packer having a check valve and a tieback receptacle. The operator pressure tests the integrity of the casing above the pac

A method of producing a well utilizes a submersible pump run on a line, such as braided wire rope, that includes power conductors. The operator sets a packer in the casing, the packer having a check valve and a tieback receptacle. The operator pressure tests the integrity of the casing above the packer, and if it passes, then runs the pump assembly on the line. The pump assembly has a shroud with a downward extending extension that seals to the passage of the packer. If the pressure test of the casing fails, the operator runs a liner into the well and engages the tieback receptacle. A smaller diameter pump is then lowered on a line into the liner and into engagement with the packer.

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The invention claimed is: 1. A method of producing a well, comprising: (a) providing a packer with a passage extending through the packer, a valve in the passage, and a tieback receptacle; (b) setting the packer in casing of the well; (c) applying fluid pressure to the portion of the casing above t

The invention claimed is: 1. A method of producing a well, comprising: (a) providing a packer with a passage extending through the packer, a valve in the passage, and a tieback receptacle; (b) setting the packer in casing of the well; (c) applying fluid pressure to the portion of the casing above the packer to test the casing, the test being used to determine if the casing leaks; then, if the test is satisfactory, (d) lowering a submersible pump into the well, engaging an intake portion of the pump with the passage in the packer, opening the valve and operating the pump to cause well fluid to flow from below the passage, through the valve and to the surface; and, if the test of step (c) is not satisfactory, (e) before step (d) running a string of conduit into engagement with the tieback receptacle; then (f) performing step (d) by lowering the submersible pump through the conduit. 2. The method according to claim 1, wherein the pump of step (d) is powered by an electrical submersible motor. 3. The method according to claim 1, wherein, if the test of step (c) is satisfactory, the pump causes the well fluid to flow up the casing in contact with walls of the casing. 4. The method according to claim 1, wherein if the test of step (c) is not satisfactory and steps (e) and (f) are performed, the pump causes the well fluid to flow up the conduit. 5. The method according to claim 1, wherein the pump of step (d) has an electrical motor that is supplied with power through a line extending up the well to the surface; and step (d) is performed by lowering the pump on the line. 6. The method according to claim 5, further comprising retrieving the pump and the motor for repair or replacement by pulling upward on the line. 7. The method according to claim 6, wherein if pulling upward on the line fails to release the pump from the packer; then the method of retrieval of the pump comprises: pulling on line sufficiently to cause the line to release from its connection to the submersible pump; then retrieving the line; then lowering a fishing tool into the well, engaging the submersible pump with the fishing tool and retrieving the fishing tool along with the submersible pump. 8. The method according to claim 1, wherein: step (a) further comprises securing a tubular nipple having a protruding lug to an upper end of the packer; and step (d) comprises: attaching an intake shroud to the pump, the intake shroud having a tubular extension on its lower end, the extension having a slot formed therein; and sliding the extension over the nipple and engaging the lug with the slot. 9. The method according to claim 1, wherein the valve in the passage in the packer is closed while performing step (c) to prevent the fluid pressure applied in step (c) from communicating with well fluid below the packer. 10. The method according to claim 1, further comprising: retrieving the pump for repair or replacement; and and while the pump is out of disengagement with the packer, closing the valve to maintain a column of well fluid in the well above the packer as a safety barrier. 11. A method of producing a well having a casing with a set of perforations, comprising: (a) providing a packer with a passage extending through the packer, a check valve in the passage, and a tieback receptacle; (b) attaching a shroud around an intake of electrical submersible pump assembly, the shroud having a downward extending extension; (c) running the packer into the casing of the well on a running string and setting the packer above the perforations; (d) applying fluid pressure to the portion of the casing above the packer to test the casing, the test being used to determine if the casing leaks; then, if the test is satisfactory, (e) lowering the pump assembly into the well on a line, and slidingly and sealingly engaging the tubular extension with the passage in the packer; then (f) supplying power to the pump assembly via power conductors in the line to cause well fluid to flow from the perforations through the passage and up the casing around the line; and, if the test of step (d) is not satisfactory, (g) before step (e) running a liner through the casing and securing a lower end of the liner to the tieback receptacle; then (h) performing step (e) by lowering the pump assembly on the line through the liner, and performing step (f), which causes the well fluid to flow up the liner around the line. 12. The method according to claim 11, wherein: step (a) further comprises securing a tubular nipple having a protruding lug to an upper end of the packer; step (b) comprises providing an upward extending slot in a lower end of the tubular extension; and step (e) comprises sliding the tubular extension over the nipple and engaging the lug with the slot. 13. The method according to claim 11, further comprising: retrieving the pump assembly for repair or replacement by pulling upward on the line. 14. The method according to claim 11, wherein if steps (g) and (h) are performed, and if pulling on the line fails to retrieve the pump assembly; then the method of retrieval of the pump assembly comprises: manipulating the liner to release the packer from the casing, and pulling the liner and the packer from the well with the pump assembly inside the liner. 15. A method of producing a well having a casing, comprising: (a) providing a packer with a passage extending through the packer and a tieback receptacle mounted to an upper end of the packer; (b) attaching a shroud around an intake of an electrical submersible pump assembly, the shroud having a downward extending tubular extension; (c) running the packer into the casing of the well and setting the packer; (d) running a liner into the casing and securing a lower end of the liner to the tieback receptacle; (e) lowering the pump assembly into the liner on a line and engaging the tubular extension of the shroud with the passage in the packer; (f) supplying power to the pump assembly via power conductors in the line to cause well fluid to flow through the passage and up the liner around the line; then, when desired, (g) retrieving the pump assembly by pulling the line and the pump assembly upward through the liner. 16. The method according to claim 15, wherein: step (a) further comprises mounting a tubular lug nipple with a protruding lug to an upper end of the packer; step (b) comprises providing an axially extending slot in the tubular extension; and step (e) comprises sliding the tubular extension over the nipple with the lug locating in the slot. 17. The method according to claim 16, wherein step (c) comprises attaching an overshot tool having a J-slot to a running string, sliding the overshot tool over the lug nipple and positioning the lug within the J-slot to retain the packer with the running string, then lowering the running string into the well. 18. An apparatus for producing a well, comprising: a packer for setting within casing of the well, the packer having a lug nipple extending upward from an upper end of the packer, the lug nipple having a protruding lug; a passage extending through the packer and the lug nipple; a check valve mounted in the passage to block downward fluid flow to enable pressure testing of the casing above the packer; a tieback receptacle mounted to an upper end of the passage and extending around the lug nipple for receiving a liner in the event of leakage of the casing; an electrical submersible pump assembly for lowering into the well; and a shroud enclosing at least a portion of the pump assembly and having a downward extending extension that sealing engages the lug nipple, the extension having a slot therein that receives the lug to counter torque due to rotation of the pump. 19. The apparatus according to claim 18, wherein the slot extends axially upward from a lower edge of the tubular extension so that the pump assembly can be retrieved by a straight upward pull. 20. The apparatus according to claim 18, further comprising: a running string for running and setting the packer, the running string having an overshot tool on a lower end that slidingly engages the lug nipple and a J-slot that receives the lug to releasably retain the packer with the running string.